Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. An electronic device having a touch sensor, the electronic device comprising: a display panel having a touch screen; a touch driver configured to drive the touch screen; a timing controller configured to control the display panel and the touch driver; and a stylus pen configured to provide a signal to the touch screen, wherein the timing controller, in order to synchronize with the stylus pen, is further configured to output a control signal having an extended vertical blanking period corresponding to a first pen signal output period of the stylus pen, a plurality of display driving periods, and a plurality of touch sensor driving periods, for one frame period, wherein one display driving period and one touch sensor driving period alternate in two or more times, and wherein a falling edge of the extended vertical blanking period occurs before a rising edge of the first pen signal output period of the stylus pen.
This invention relates to electronic devices with touch sensors, particularly those using stylus pens for input. The problem addressed is synchronizing the display and touch sensor operations with the stylus pen's signal output to improve responsiveness and accuracy. The device includes a display panel with a touch screen, a touch driver, a timing controller, and a stylus pen. The timing controller coordinates the display and touch sensor operations by generating a control signal with an extended vertical blanking period, multiple display driving periods, and multiple touch sensor driving periods within a single frame period. The display and touch sensor driving periods alternate at least twice per frame. The extended vertical blanking period is timed so that its falling edge occurs before the rising edge of the stylus pen's signal output period. This synchronization ensures that the touch sensor is active when the stylus pen transmits signals, improving detection accuracy. The alternating display and touch sensor driving periods allow for efficient use of the frame period, balancing visual output and touch input responsiveness. The invention enhances the performance of stylus-based touch interfaces in electronic devices.
2. The electronic device of claim 1 , wherein a signal in the first pen signal output period of the stylus pen includes a beacon signal including frequency information and a synchronization signal of the stylus pen, and a digital signal including frequency information and phase information of the stylus pen.
This invention relates to electronic devices and stylus pens, specifically addressing the need for improved signal transmission and synchronization between a stylus pen and an electronic device. The invention provides a stylus pen that generates a signal during a first pen signal output period, which includes both a beacon signal and a digital signal. The beacon signal contains frequency information and a synchronization signal of the stylus pen, enabling the electronic device to detect and identify the stylus pen. The digital signal includes frequency and phase information of the stylus pen, allowing the electronic device to accurately track the stylus pen's position and movement. The electronic device processes these signals to determine the stylus pen's characteristics, such as its frequency and phase, which are essential for precise input detection and tracking. The invention enhances the accuracy and reliability of stylus pen interactions with electronic devices by providing structured signal transmission that includes both identification and tracking data. This ensures seamless synchronization and improved user experience in applications requiring precise input, such as drawing, writing, or gesture-based interactions.
3. The electronic device of claim 1 , wherein a rising edge period of the extended vertical blanking period is synchronized with a falling edge period of the first pen signal output period of the stylus pen.
The invention relates to electronic devices with touchscreen displays and stylus pen input systems. The problem addressed is ensuring synchronization between the display's vertical blanking period and the stylus pen's signal output period to improve touch detection accuracy and reduce interference. The electronic device includes a display panel with a vertical blanking period, during which the display refreshes, and a stylus pen that emits a first pen signal during a first pen signal output period. The invention extends the vertical blanking period to overlap with the stylus pen's signal output period. Specifically, the rising edge of the extended vertical blanking period is synchronized with the falling edge of the first pen signal output period. This synchronization ensures that the stylus pen's signal is detected during a stable display state, minimizing noise and improving touch accuracy. The extended vertical blanking period may also include additional sub-periods for further signal processing or calibration. The stylus pen may emit multiple signals, with the first signal being used for initial touch detection. The synchronization mechanism may involve timing controllers or signal processors that adjust the display's blanking period dynamically based on the stylus pen's signal timing. This approach enhances the reliability of stylus-based input in electronic devices with touchscreens.
4. The electronic device of claim 1 , wherein a rising edge period of the extended vertical blanking period occurs later than a falling edge period of the first pen signal output period of the stylus pen.
This invention relates to electronic devices with stylus pen input systems, particularly addressing synchronization issues between the device's display refresh timing and the pen's signal output. The problem occurs when the device's vertical blanking period (VBP) and the stylus pen's signal output period overlap, causing interference or missed input detection. The solution involves extending the VBP such that its rising edge occurs after the falling edge of the stylus pen's signal output period. This ensures the pen's signal is fully transmitted before the display refresh begins, preventing signal corruption. The extended VBP allows the device to maintain stable display updates while accurately capturing the stylus pen's input. The stylus pen generates a periodic signal to enable touch detection, and the device's display controller adjusts the VBP timing to avoid conflicts. This synchronization improves input responsiveness and reliability in devices like tablets and touchscreen computers. The invention may also include additional features such as adaptive timing adjustments based on pen usage patterns or environmental conditions to further optimize performance.
5. The electronic device of claim 1 , wherein a rising edge period of the extended vertical blanking period occurs before a falling edge period of the first pen signal output period of the stylus pen.
This invention relates to electronic devices with touch-sensitive displays and stylus pen interaction. The problem addressed is optimizing the synchronization between the display's vertical blanking period and the stylus pen's signal output to improve touch and stylus detection accuracy. The device includes a display panel with a vertical blanking period extended beyond its standard duration. This extended period allows for additional time to process touch and stylus inputs without interference from display refresh cycles. The stylus pen emits a first signal during a defined output period, and the device ensures that the rising edge of the extended vertical blanking period occurs before the falling edge of the stylus pen's first signal output period. This timing alignment prevents signal overlap, reducing errors in stylus position detection. The extended blanking period also provides a dedicated window for capturing stylus signals, enhancing input responsiveness and precision. The device may further include a touch controller to process the stylus signals during this extended period, ensuring accurate tracking of the stylus's position on the display. This synchronization method improves the reliability of stylus-based interactions in electronic devices with touch-sensitive displays.
6. The electronic device of claim 1 , wherein the stylus pen further includes a second pen signal output period, and the first pen signal output period and the second pen signal output period are separated with a predetermined delay time.
The invention relates to electronic devices with stylus pens, specifically addressing signal transmission efficiency and interference reduction. The stylus pen emits pen signals to interact with the electronic device, but conventional designs may suffer from signal overlap or interference, leading to inaccurate input detection. To solve this, the stylus pen includes a second pen signal output period, distinct from the first, with a predetermined delay separating the two periods. This staggered timing prevents signal collisions and ensures clear, uninterrupted communication between the stylus and the device. The delay time is set to avoid overlap while maintaining responsiveness. The stylus pen may also include a signal generator to produce the pen signals, a controller to manage the output timing, and a communication module to transmit the signals to the electronic device. The device itself may have a receiver to detect these signals and a processor to interpret them for input processing. This design improves stylus performance by reducing interference and enhancing detection accuracy.
7. A method of driving an electronic device having a touch sensor including a display panel having a touch screen, a touch driver configured to drive the touch screen, a timing controller configured to control the display panel and the touch driver, and a stylus pen configured to provide a signal to the touch screen, the method comprising: when the stylus pen is positioned on the touch screen and frame video data is input from outside, storing the frame video data in a frame memory, and outputting a control signal for synchronization with the stylus pen, wherein the control signal has an extended vertical blanking period corresponding to a first pen signal output period of the stylus pen, a plurality of display driving periods, and a plurality of touch sensor driving periods, for one frame period, wherein one display driving period and one touch sensor driving period alternate in two or more times, and wherein a falling edge of the extended vertical blanking period occurs before a rising edge of the first pen signal output period of the stylus pen.
This invention relates to driving an electronic device with a touch sensor, specifically addressing synchronization issues between a stylus pen and a display panel with a touch screen. The device includes a display panel with a touch screen, a touch driver, a timing controller, and a stylus pen. The problem solved is ensuring proper synchronization between the stylus pen's signal and the display panel's operation, particularly during video data input. When the stylus pen is positioned on the touch screen and frame video data is received, the method stores the video data in a frame memory and outputs a control signal synchronized with the stylus pen. The control signal features an extended vertical blanking period aligned with the stylus pen's first signal output period, followed by alternating display driving and touch sensor driving periods within a single frame period. The display and touch sensor driving periods alternate at least twice per frame. The extended vertical blanking period's falling edge occurs before the stylus pen's first signal output period begins, ensuring proper timing coordination. This approach optimizes the interaction between the stylus pen and the touch screen, preventing signal conflicts and improving responsiveness during video display.
8. The method of claim 7 , wherein a signal in the first pen signal output period of the stylus pen includes a beacon signal including frequency information and a synchronization signal of the stylus pen, and a digital signal including frequency information and phase information of the stylus pen.
A method for operating a stylus pen in an electronic device involves transmitting signals during a first pen signal output period. The stylus pen emits a beacon signal containing frequency information and a synchronization signal to establish communication with the electronic device. Additionally, the stylus pen transmits a digital signal that includes both frequency and phase information, enabling precise tracking of the stylus pen's position and movement. The beacon signal ensures the electronic device can detect and synchronize with the stylus pen, while the digital signal provides detailed data for accurate input processing. This method enhances the reliability and precision of stylus-based input systems by ensuring consistent signal transmission and synchronization between the stylus and the device. The combination of frequency and phase information in the digital signal allows for improved tracking performance, reducing latency and improving responsiveness in applications such as drawing, writing, or navigation. The method is particularly useful in touch-sensitive displays where accurate stylus detection is critical for user interaction.
9. The method of claim 7 , wherein a rising edge period of the extended vertical blanking period is synchronized with a falling edge period of the first pen signal output period of the stylus pen.
A method for synchronizing a rising edge period of an extended vertical blanking period with a falling edge period of a first pen signal output period of a stylus pen is disclosed. This technique is used in display systems, particularly those incorporating stylus-based input, to improve synchronization between the display's blanking period and the stylus pen's signal transmission. The extended vertical blanking period is a time interval during which the display refreshes, and the stylus pen transmits signals during its output period. By aligning the rising edge of the blanking period with the falling edge of the pen's signal output, interference between the display's refresh and the stylus's signal transmission is minimized, ensuring accurate and reliable input detection. The method enhances the performance of touch-sensitive displays by reducing signal collisions and improving the accuracy of stylus tracking. This synchronization is particularly useful in high-resolution or high-refresh-rate displays where precise timing is critical for maintaining input responsiveness and display quality. The technique may be implemented in electronic devices such as tablets, smartphones, or digital drawing tablets that use active stylus pens for input.
10. The method of claim 7 , wherein a rising edge period of the extended vertical blanking period occurs later than a falling edge period of the first pen signal output period of the stylus pen.
A method for synchronizing display and stylus pen signals in an electronic device involves managing timing relationships between display refresh cycles and stylus pen signal outputs. The method addresses the challenge of ensuring proper synchronization between the display's vertical blanking period and the stylus pen's signal output to prevent interference and improve input accuracy. The display's extended vertical blanking period is adjusted such that its rising edge occurs after the falling edge of the stylus pen's first signal output period. This timing adjustment ensures that the stylus pen's signal is fully transmitted before the display's active refresh period begins, reducing potential conflicts between the two signals. The method may also include generating a synchronization signal to coordinate the timing of the display's vertical blanking period with the stylus pen's signal output, ensuring consistent and reliable input detection. This approach is particularly useful in touch-sensitive displays where precise timing is critical for accurate stylus input tracking.
11. The method of claim 7 , wherein a rising edge period of the extended vertical blanking period occurs before a falling edge period of the first pen signal output period of the stylus pen.
A method for synchronizing display and stylus pen signals in an electronic device involves extending the vertical blanking period of a display to ensure proper timing coordination with a stylus pen. The vertical blanking period is extended to create a defined interval during which the display is inactive, allowing the stylus pen to operate without interference. The stylus pen generates a first pen signal output period, which is a time window during which the pen transmits or receives signals. The method ensures that the rising edge of the extended vertical blanking period occurs before the falling edge of the first pen signal output period of the stylus pen. This timing relationship prevents overlap between the display's active period and the stylus pen's signal transmission, reducing interference and improving synchronization. The extended vertical blanking period may be adjusted dynamically based on the stylus pen's signal timing to maintain optimal coordination. This approach is particularly useful in touch-sensitive displays where precise timing between the display and stylus is critical for accurate input detection and processing. The method may also include additional steps to monitor and adjust the timing of the vertical blanking period and the pen signal output period to adapt to varying operating conditions.
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June 23, 2020
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